Labconco PuriCare Bedding Disposal Stations 3840020 - Manual (Page 20)

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Chapter 4: Theory Of Operation And Safety Precautions
Prefilter
The prefilter is located just below the HEPA filter. Its
purpose is to lengthen the operating life of the HEPA
filter by removing large particles before they can block
it.
REGULARLY SCHEDULED
INSPECTION AND REPLACEMENT
OF THE PREFILTER IS KEY TO
MAINTAINING PROPER
OPERATION OF THE ENCLOSURE.
HEPA Filter
HEPA filters are disposable, dry-type particulate filters.
The filter material or media is typically made of
borosilicate microfibers that are made into a thin sheet,
in a process similar to the production of paper. This
sheet is folded, or pleated to increase its surface area.
The pleats are held in place by aluminum diffusers or
by beads of glue that add rigidity to the media pack.
The media pack is then set into a suitable frame, and the
perimeter sealed to the filter frame, as shown in Figure
4-1.
The HEPA filter media is very fragile.
Do not touch or contact the media
surface. If you think the surface of a
HEPA filter is damaged, DO NOT
USE THE STATION. Have the
HEPA filter integrity tested by a
qualified certifier before using the
station.
HEPA Filters are only effective
against particulate material. Gases
will pass through the filter.
!
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